Idler Pulley for Cub Cadet Husqvarna 01004101 02004447 539976688 Fit 44" 50" Decks LTX1050 Z-Force 44 48 50 54 60 Tank 48 60 Lawn Mowers

What It Is

This is a replacement idler pulley for the spindle drive belt on Cub Cadet and Husqvarna lawn tractors and zero-turn mowers with 44" to 60" fabricated decks. It keeps belt tension correct and reduces vibration during mowing.

Fitment & Compatibility

Check your OEM part number first. This pulley replaces Cub Cadet 01004101, 02004447, and Husqvarna 539976688. It fits select 44", 50" decks on LTX1050 tractors, and Z-Force models with 44", 48", 50", 54", or 60" decks, plus Tank 48" and 60" zero-turns.

Measure before you buy. The pulley has a 3.75" outside diameter and a 5/8" bore. Verify your old pulley’s diameter and bore size match. If your deck uses a 1/2" bore or a different diameter, this won’t work.

Cross-check your deck model. Not all Cub Cadet or Husqvarna decks use this pulley—even within the same series. Look up your mower’s deck part number or serial number to confirm.

Key Things to Know

• Quality is solid for the price. It’s a steel pulley with a sealed ball bearing. Users report it holds up well under normal residential use.
• Installation is straightforward. Remove the old pulley (usually one bolt), swap the bearing if needed, and bolt the new one on. No special tools required.
• Common gotcha: The pulley may come with a plastic dust cap that can loosen during use. Check it after the first few hours and tighten if needed.
• Belt alignment matters. If your old pulley was worn unevenly, your belt may have been misaligned. Inspect the belt and other pulleys before installing this one.

Should You Buy It

If you have a confirmed fit (check your OEM part number and deck size) and need a reliable, budget-friendly replacement for a worn or noisy idler pulley, this is a solid choice. It’s not for heavy commercial use, but for residential mowing it works well and has strong user reviews.